Review: Fenix TK25 R&B, an 18650 flashlight with high-output red and blue secondary emitters

The TK25 R&B is an unconventional design with a rotating head to switch between two white, and one each red and blue emitters. It offers very high red and blue output, but no low-output modes to preserve dark adaptation. It's intended for hunting animals that don't react to red light, and following blood trails with blue. It should work well for that application, though better color quality for the white emitters would be most welcome.